diff options
| -rw-r--r-- | qemu-options.hx | 9 | ||||
| -rw-r--r-- | ui/vnc-enc-tight.c | 2 | ||||
| -rw-r--r-- | ui/vnc.c | 13 | ||||
| -rw-r--r-- | ui/vnc.h | 1 |
4 files changed, 20 insertions, 5 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 945edf3562..badb730678 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -913,6 +913,15 @@ option is set, VNC client may receive lossy framebuffer updates depending on its encoding settings. Enabling this option can save a lot of bandwidth at the expense of quality. +@item non-adaptive + +Disable adaptive encodings. Adaptive encodings are enabled by default. +An adaptive encoding will try to detect frequently updated screen regions, +and send updates in these regions using a lossy encoding (like JPEG). +This can be really helpfull to save bandwidth when playing videos. Disabling +adaptive encodings allow to restore the original static behavior of encodings +like Tight. + @end table ETEXI diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c index 82c1e96e21..59333940ed 100644 --- a/ui/vnc-enc-tight.c +++ b/ui/vnc-enc-tight.c @@ -1546,7 +1546,7 @@ static int send_sub_rect(VncState *vs, int x, int y, int w, int h) vnc_tight_stop(vs); #ifdef CONFIG_VNC_JPEG - if (vs->tight.quality != (uint8_t)-1) { + if (!vs->vd->non_adaptive && vs->tight.quality != (uint8_t)-1) { double freq = vnc_update_freq(vs, x, y, w, h); if (freq < tight_jpeg_conf[vs->tight.quality].jpeg_freq_min) { @@ -2387,10 +2387,12 @@ static int vnc_refresh_server_surface(VncDisplay *vd) VncState *vs; int has_dirty = 0; - struct timeval tv; + struct timeval tv = { 0, 0 }; - gettimeofday(&tv, NULL); - has_dirty = vnc_update_stats(vd, &tv); + if (!vd->non_adaptive) { + gettimeofday(&tv, NULL); + has_dirty = vnc_update_stats(vd, &tv); + } /* * Walk through the guest dirty map. @@ -2419,7 +2421,8 @@ static int vnc_refresh_server_surface(VncDisplay *vd) if (memcmp(server_ptr, guest_ptr, cmp_bytes) == 0) continue; memcpy(server_ptr, guest_ptr, cmp_bytes); - vnc_rect_updated(vd, x, y, &tv); + if (!vd->non_adaptive) + vnc_rect_updated(vd, x, y, &tv); QTAILQ_FOREACH(vs, &vd->clients, next) { set_bit((x / 16), vs->dirty[y]); } @@ -2754,6 +2757,8 @@ int vnc_display_open(DisplayState *ds, const char *display) #endif } else if (strncmp(options, "lossy", 5) == 0) { vs->lossy = true; + } else if (strncmp(options, "non-adapative", 13) == 0) { + vs->non_adaptive = true; } } @@ -144,6 +144,7 @@ struct VncDisplay time_t expires; int auth; bool lossy; + bool non_adaptive; #ifdef CONFIG_VNC_TLS int subauth; /* Used by VeNCrypt */ VncDisplayTLS tls; |